中成药保济丸中葛根素含量分析

对羊城药厂保济丸、香港李众胜堂保济丸及按组方自制保济丸中葛根素含量采用高效液相色谱法进行了测定分析.考察了样品制备方法、流动相系统、检测波长等因素对分析结果的影响;结果表明葛根素和其它组分可达基线分离,葛根素浓度在4×10-3～2 1×10-2mg/mL内线性关系良好(r=0 99826).保济丸中葛根素的回收率99 34%,RSD<1 78%.保剂丸经简单的溶解和过滤后即可直接进样测定.     

RP-HPLC法测定不同树龄紫油厚朴中和厚朴酚及厚朴酚的含量

建立了RP-HPLC法测定紫油厚朴药材中和厚朴酚及厚朴酚的含量.采用依利特ODS2 C18(200 mm×4.6mm,5μm)色谱柱,以甲醇∶水=75∶25(V/V)为流动相,检测波长294 nm,流速1.0 mL/min,柱温25℃.结果得到厚朴酚的平均回收率为98.10%,RSD为0.42%,和厚朴酚的平均回收率为99.86%,RSD为0.86%.该方法重复性好、精密度高、线性关系良好,快速、准确;为紫油厚朴药材品质评价、品种选育及含量控制提供了科学依据.     

离子对反相高效液相色谱法测定VB2,VB6,VB12,VC和叶酸

建立了用离子对反相高效液相色谱法同时测定VB2,VB6,VB12,VC和叶酸含量的方法.用HypersilC18色谱柱(ODS2,5 μm,4.6 mm×150 mm,),V(甲醇)V(0.5%醋酸溶液)=3070,其中每升流动相加入2.5 mmol的戊烷磺酸钠作为流动相.柱温30℃时于254 nm波长处以外标法测定.结果表明VB2,VB6,VB12,VC和叶酸的浓度与峰高成良好的线性关系.VB2的线性范围为2.0×10-7～8.0×10-6g/mL(r=0.999 8),VB6的线性范围为2.0×10-6～5.0×10-4g/mL(r=0.999 0),VB1 2的线性范围为2.0×10-7～8.0×10-4g/mL(r=0.999 9),叶酸的线性范围为2.0×10～5.0×10-5g/mL(r=0.998 7),VC的线性范围为5.0×10-7～8.0×10-5g/mL(r=0.999 1).VB2,VB6,VB12,VC和叶酸的检测限分别为6×10-9g/mL,6×10-8g/mL,7×10-9g/mL,1×10-9g/mL和6×10-8g/mL实验表明该法准确,快捷,操作简便,应用于蜂蜜和复合维生素片中维生素的测定,取得了很好的结果.     

反相高效液相色谱法测定发酵液中他克莫司含量

建立了发酵液中他克莫司的RP-HPLC测定方法.采用Kromasil C8 (250 mm×4.6 mm, 5 μm) 色谱柱,流动相为V(异丙醇)∶V(水)=35∶65,柱温50 ℃,流速1.0 mL/min,检测波长220 nm,对影响分离和检测的色谱柱、流动相、柱温、检测波长等进行了筛选.结果表明,他克莫司标准品质量浓度在10～100 mg/L范围内线性关系良好,线性方程为y=0.194 9ρ -0.055 3 (r=0.999 6),发酵液试样中他克莫司的平均回收率为99.8 % (n=9),相对标准偏差为0.58 %.     

快速提取及测定木香顺气丸中厚朴酚与和厚朴酚的研究

用ASE300型快速溶剂萃取系统进行快速萃取藿香正气片中厚朴酚及和厚朴酚,利用反相高效液相色谱法测定木香顺气丸中厚朴酚及和厚朴酚的含量,Diamonsil(TM)C18柱(250 mm×4.6 mm,5μm),流动相为甲醇-水-冰醋酸(79∶21∶0.25),流速为1.0 mL/min,检测波长为294 nm,柱温为23℃.HPLC法测得在范围内呈良好线性关系,和厚朴酚的平均回收率为100.78%,RSD为1.52%;厚朴酚的平均回收率为99.6%,RSD为1.18%.本方法简便、准确、专属性强.     

反相高效液相色谱法测定PELA微粒中胰岛素含量

为测定PELA微粒中胰岛素含量,建立反相高效液相色谱方法. 以Zorbax300SB-C18高效液相色谱柱分离;检测波长为220 nm;流动相组成为:V(H2O(含φ(TFA)＝0.15%))∶V(CH3CN)＝66∶34;保留时间为4.3 min. 结果在ρ(胰岛素)为10～200 μg/mL范围内,峰面积(A)与胰岛素质量浓度(ρ)成线性变化,其线性方程为:ρ=7.82×10-2A +9.88×10-2,相关系数r=0.999 95. 日内差和日间差分别为0.6%和0.7%. 当ρ(胰岛素)为60, 80和100 μg/mL时的回收率分别为(98.1±0.5)%, (99.6±1.5)%和(99.4±1.0)%(n＝6). 测得胰岛素在PELA微粒中的包封率为(56.3±3.3)%(n＝6).     

HPLC法测定不同产地牡丹皮中丹皮酚的含量

为建立测定牡丹皮中丹皮酚含量的高效色谱方法,采用HPLC法,色谱柱SupelcosilTMLC18柱(4.6mm,5μm×150mm);流动相:甲醇-醋酸-水(58∶2∶40),流速1mL/min,检测波长:274nm;柱温为室温。结果丹皮酚在(0.01～0.55)μg/mL范围内线性关系良好(r=0.9996),平均回收率99.87%,RSD为1.46%。该法简便、快速,重现性好,适用于牡丹皮中丹皮酚的定量分析。     

藿香正气片中厚朴酚与和厚朴酚的快速提取及测定研究

目的:快速提取及测定藿香正气片中厚朴酚及和厚朴酚.方法:用ASE300型快速溶剂萃取系统进行快速萃取藿香正气片中厚朴酚及和厚朴酚,利用反相高效液相色谱法测定厚朴酚及和厚朴酚的含量,Diamonsil(TM)C18柱(250 mm×4.6 mm,5μm),流动相:甲醇-水-冰醋酸(79∶21∶0.25),流速:1.0 mL/min,检测波长:294 nm,柱温:23℃,结果:HPLC法测得在范围内呈良好线性关系,和厚朴酚的平均回收率为100.27%,RSD为1.38%;厚朴酚的平均回收率为99.88%,RSD为1.25%.结论:该方法简便、准确、专属性强,能有效地控制藿香正气片的质量.     

苯丙醇的高效液相色谱测定方法研究

运用高效液相色谱法测定苯丙醇的含量,采用C18反相色谱分析柱(4.6×250mm,5μm),流动相为乙腈-H2O(46∶54),流速1.0mL/min,柱温30℃,检测波长257nm.苯丙醇在10~1000mg/mL范围内,线性关系良好(r=0.9991),平均回收率为99.5%.     

反相高效液相色谱法快速测定靛蓝中残留苯胺

建立了用反相高效液相色谱测定靛蓝中残留痕量苯胺含量的方法.用YWG C18(5μm,300mm×5mmID) 柱,V甲醇∶V水=70∶30的溶液为流动相,柱温30℃时于285nm波长处以外标法测定.结果表明苯胺在6.92× 10-8～3.59×10-4g/mL范围内,浓度与峰面积有良好的线性关系(r=0.9997).苯胺的回收率为98.34%～ 98.36%,相对标准偏差为1.84%～3.03%(n=5).检测限为2.02×10-9g/mL(S/N=3).实验表明该法简便、快 速,应用于实际靛蓝样品中残留痕量苯胺的测定,取得了很好的结果.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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